#!/usr/bin/env python3

# rsync.py - operations for rsync
#
# Copyright (c) 2019-2023 Fpemud <fpemud@sina.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.


import os
import pathlib
from ._util import LastUpdateTime
from ._main import AppStat, AppImplBase


class AppImpl(AppImplBase):

    _BINARY_PATH = "/usr/bin/rsync"

    _REFERENCE_IMPLEMENTATION_BINARY_PATH = "/usr/bin/rsync-reference"

    @staticmethod
    def get_name():
        return "rsync"

    def is_installed(self):
        return os.path.exists(self._BINARY_PATH)

    def system_get_info(self, app_data_dir):
        if not self.is_installed():
            return (AppStat.NOT_INSTALLED, None, None)

        if not self._isRobustExtensionInstalled():
            return (AppStat.NOT_MANAGEABLE, "", None)
        else:
            return (AppStat.FULLY_ROBUSTIFIED, "", LastUpdateTime.read(app_data_dir))

    def system_robustify_config(self, app_data_dir):
        pass

    def user_get_info(self):
        assert False

    def user_robustify_config(self, username):
        assert False

    def _isRobustExtensionInstalled(self):
        if not os.path.exists(self._REFERENCE_IMPLEMENTATION_BINARY_PATH):
            return False

        try:
            if os.path.basename(self._REFERENCE_IMPLEMENTATION_BINARY_PATH) not in pathlib.Path(self._BINARY_PATH).read_text():
                return False
        except ValueError:
            # failed to decode to text
            return False

        return True
